.forum{
  width: 1050px;
  margin: 0 auto;
  height: auto;
  margin-top: 20px;
  display: flex;
  background-color:#f0efee;
  .left{
    flex: 3;
    padding: 20px;
    background-color: #fff;
    margin-right: 20px;
    .leftTitle{
      height: 40px;
      border-bottom: 1px solid #f0efee;
      margin-bottom: 10px;
    }
    .container{
      height: 280px;
      width: 100%;
      position: relative;
      padding-bottom: 10px;
      margin-bottom: 20px;
      border-bottom: 2px solid #2f3238;
      .img{
        width: 100%;
        height: 260px;

      }
      .tip{
        width: 100%;
        height: 40px;
        background-color: rgba(0,0,0,0.6);
        position: absolute;
        bottom: 0;
        left: 0;
        color:#fff;
        text-align: center;
        line-height: 40px;
        font-weight: bolder;
      }
    }
  }
  .right{
    flex: 2;
    background-color: #fff;
    padding: 20px;
    .rightTitle{
      height: 40px;
      border-bottom: 1px solid #f0efee;
      margin-bottom: 10px;
    }
    .container{
      height: auto;
      width: 100%;
      .img-box{
        position: relative;
        margin-bottom: 20px;
        .img{
          width: 100%;
          height: 160px;
        }
        .tip{
          width: 100%;
          height: 30px;
          background-color: rgba(0,0,0,0.6);
          position: absolute;
          bottom: 0;
          left: 0;
          color:#fff;
          text-align: center;
          line-height: 30px;
          font-weight: bolder;
        }
      }

    }
  }
}
.c1{
   background: url(./c1.png) center center no-repeat;
   background-size:100% ;
 }
.c2{
  background: url(./c2.png) center center no-repeat;
  background-size:100% 100% ;
}
.i1{
  background: url(./i1.png) center center no-repeat;
  background-size:100% 100% ;
}
.i2{
  background: url(./i2.png) center center no-repeat;
  background-size:100% 100% ;
}
.i3{
  background: url(./i3.png) center center no-repeat;
  background-size:100% 100% ;
}